Discover how high-quality 11.5x21x1 air filters from
Filterbuy can improve indoor air quality, reduce
energy costs, and benefit your health.
Breathe Easy:
Unlock the
Benefits of
Premium
11.5x21x1 Air
Filters
Indoor
Air
Quality
Crisis
Indoor Air Pollution Crisis
The EPA states that indoor air is 5 times
more polluted than outdoor air
Negative Health Impact
Up to 50% of illnesses are worsened by
poor indoor air quality
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2
The Power of Better Filtration
Improved Filtration
Efficiency
High-quality 11.5x21x1 pleated filters
from Filterbuy capture more
pollutants, allergens, and particles
compared to flat filters, providing
cleaner air.
Energy Efficiency Savings
Premium filters help HVAC systems
run more efficiently, potentially
reducing energy bills by up to 10%.
Enhanced Health Benefits
Breathing cleaner indoor air
reduces respiratory issues and
allergy symptoms, especially for
those with sensitivities.
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3
Understanding MERV Ratings
MERV 13 Filters
Captures the most particles, including
smog, smoke, and bacteria - best for
homes with significant air quality
concerns.
MERV 8 Filters
MERV 11 Filters
Best for basic dust capture, but may miss
smaller allergens like pollen and dander.
Great for allergy control, capturing a wide
range of particles while maintaining
strong airflow - ideal for most homes.
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4
Trusted by Homeowners
Fewer Allergy Symptoms
Homeowners with allergies report
experiencing fewer flare-ups, especially at
night, after installing Filterbuy 11.5x21x1 filters.
Exceptional Service
Filterbuy customers praise the company's
fast shipping and order accuracy, ensuring
a hassle-free purchasing experience.
Improved Air Quality
Many customers noticed a significant
reduction in dust and allergens in their
homes after using Filterbuy 11.5x21x1 filters.
Reduced Energy Bills
Customers report saving up to 10% on their
energy bills after switching to premium
Filterbuy 11.5x21x1 air filters.
2024 Proprietary and Confidential. All Rights Reserved.
5

https://filterbuy.com/air-filters/11-5x21x1/


https://filterbuy.com/air-filters/11-5x21x1/

By investing in high-quality
11.5x21x1 air filters from
Filterbuy, you can enjoy cleaner
indoor air, improved health,
and reduced energy costs.
Regular filter replacement is
key to maintaining optimal
HVAC performance and air
quality in your home.
Discover more
at https://filterbuy.com/air-filters/11-
5x21x1/
Frequently Asked Questions
MERV 11 is suitable for many residential settings, offering
enhanced filtration without significantly impeding airflow
in compatible systems.
Yes, using the exact size air filter specified for your HVAC
system is crucial to ensure proper fit and efficient
filtration.
MERV 11 filters may be too restrictive for older furnaces,
potentially reducing airflow and straining the system.
Is MERV 11 too high for residential?
Does my air filter need to be exact
size?
Is MERV 11 too restrictive for an old
furnace?
MERV ratings between 5 and 8 are generally best for
airflow, striking a balance between filtration efficiency
and system performance.
High MERV filters can restrict airflow, potentially reducing
HVAC efficiency and increasing wear and tear on the
system if not compatible.
What MERV rating is best for
airflow?
Is there a downside to high MERV
filters?
2024 Proprietary and Confidential. All Rights Reserved.
7